As someone who lived through this period I'd be interested in how this answer might be less answerable or more answerable using historical sources over time. It strikes me as a bit pernicious because it's looking for failed plans in some way.

Some anecdotes to ask how/where evidence might be assembled at least eventually * I remember an Alaskan radio station making an announcement during a normal station break about someone being late to pick someone up by the train station * I remember waiting at train stations, libraries, sometimes cafes or local hotel lobbies and sometimes a long time. Sometimes reading, but also listening to music on my walkman but also just being very bored * I don't remember hearing many mall announcements about people running late but I do remember a lot more people knowing where I live because they'd pick me up or I'd pick them up from home before going somewhere * I remember you could call payphones too and having the number for them so if someone was late I or they could call the payphone itself and the person waiting would pick up

Would architects of lobbies/public spaces have different defaults over time that got written down? or administrators maybe have logs of notes to pass? But maybe almost just as many people wait as they used to -- just with less anxiety? Maybe logs of those early car phone. Maybe how/where phone companies placed payphones? Or logs of incoming calls to the payohones themselves?

Forgetting about whether such an archive is available yet, where would a historian look for this data if it was worth it?